Blue Notes · Umpire Grade2026-04-14
WSH @ PIT
Home plate: John Libka
“An honest evening's grade: nothing loud, nothing missed by much.”
Umpire Grade
92.9% accurate
Run Favor
runs, PIT
ABS Overturns
of 6 reviewed
What this shows — how John Libka called the 168 pitches that were taken (no swing), graded against the tracked rulebook strike zone. He got 156 right. Below, only his misses are plotted, alongside every pitch the ABS (Automated Ball-Strike System) reviewed on a challenge.
The zone, as he called it
strike called ballball called strikeABS overturnedABS upheld
The calls that moved the game
- 1+0.28▼2 · 1-2 strike called ball
Nick Gonzales vs Miles Mikolas - 2-0.13▼1 · 1-1 ball called strike
Bryan Reynolds vs PJ Poulin - 3+0.13▼1 · 1-0 strike called ball
Brandon Lowe vs PJ Poulin
Run impact from the count run-value table: a missed strike three is worth far more than one on 3-0.
ABS — the Automated Ball-Strike System
6 pitches went to the robots · 3 overturned (ump overruled) · 3 upheld (ump confirmed). This is Hawkeye ground truth, no model involved.
- 1Jorbit Vivas — ump said strike, robot ruled strike: upheld.
- 2Joey Bart — ump said strike, robot ruled ball: overturned.
- 3Bryan Reynolds — ump said ball, robot ruled strike: overturned.
- 4Oneil Cruz — ump said ball, robot ruled strike: overturned.
- 5Joey Bart — ump said ball, robot ruled ball: upheld.
- 6James Wood — ump said strike, robot ruled strike: upheld.
Our tracked-rulebook zone matched the ABS ruling on 4 of 6 — a zone-definition gap (ABS grades a standardized, height-based zone), not our error.